K-array KH7, Руководство пользователя

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KH7 Ver. 1.2
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7.4 PRoTeCTIon CIRCUITRY
Both the Power supply and the amplifier sections are equipped with several protection circuits.
Power supply protections aim to isolate a faulty section in electrical power system from the rest of
the device in order to prevent the propagation of the fault and limit device damages. They comprise
overcurrent, overvoltage and thermal protections.
Amplifier protections are triggered by audio signal current and voltage – by comparing input and output –
and NTC (Negative Temperature Coefficient) thermistors. A Peak Current Shut Down and a Temperature
Protection Limiter protect the output stage.
High frequency stationary signals, like steady sinusoidal signals – improperly referred as continuous or
permanent signals – with high amplitude tend to stress the amplifier section of the modules as well as
the loudspeaker’s voice coils. When a high frequency stationary loud signal is fed into the amplifier, a
dedicated limiter restricts its mean current depending on its level and frequency. The process is auto
adaptive and frequency driven: at a higher frequency the limiter acts faster.